public class text_1 {
    public static void main(String[] args) {
        byte a = 10;
        System.out.println(a);
        short b = 20;
        System.out.println(b);
        int c = 30;
        System.out.println(c);
        //加后缀
        long  d = 123456789456789123L;
        System.out.println(d);
        float e = 3.1F;
        System.out.println(e);
        char f = 'a';
        System.out.println(f);
        boolean g = true;
        System.out.println(g);
    }
}
